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/arch/m68k/sun3x/time.c

https://bitbucket.org/evzijst/gittest
C | 103 lines | 78 code | 17 blank | 8 comment | 2 complexity | 9c5ffbfc88c503c6f37534074515e453 MD5 | raw file
  1/*
  2 *  linux/arch/m68k/sun3x/time.c
  3 *
  4 *  Sun3x-specific time handling
  5 */
  6
  7#include <linux/types.h>
  8#include <linux/kd.h>
  9#include <linux/init.h>
 10#include <linux/sched.h>
 11#include <linux/kernel_stat.h>
 12#include <linux/interrupt.h>
 13#include <linux/rtc.h>
 14#include <linux/bcd.h>
 15
 16#include <asm/irq.h>
 17#include <asm/io.h>
 18#include <asm/system.h>
 19#include <asm/traps.h>
 20#include <asm/sun3x.h>
 21#include <asm/sun3ints.h>
 22#include <asm/rtc.h>
 23
 24#include "time.h"
 25
 26#define M_CONTROL 0xf8
 27#define M_SEC     0xf9
 28#define M_MIN     0xfa
 29#define M_HOUR    0xfb
 30#define M_DAY     0xfc
 31#define M_DATE    0xfd
 32#define M_MONTH   0xfe
 33#define M_YEAR    0xff
 34
 35#define C_WRITE   0x80
 36#define C_READ    0x40
 37#define C_SIGN    0x20
 38#define C_CALIB   0x1f
 39
 40int sun3x_hwclk(int set, struct rtc_time *t)
 41{
 42	volatile struct mostek_dt *h =
 43		(struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL);
 44	unsigned long flags;
 45
 46	local_irq_save(flags);
 47
 48	if(set) {
 49		h->csr |= C_WRITE;
 50		h->sec = BIN2BCD(t->tm_sec);
 51		h->min = BIN2BCD(t->tm_min);
 52		h->hour = BIN2BCD(t->tm_hour);
 53		h->wday = BIN2BCD(t->tm_wday);
 54		h->mday = BIN2BCD(t->tm_mday);
 55		h->month = BIN2BCD(t->tm_mon);
 56		h->year = BIN2BCD(t->tm_year);
 57		h->csr &= ~C_WRITE;
 58	} else {
 59		h->csr |= C_READ;
 60		t->tm_sec = BCD2BIN(h->sec);
 61		t->tm_min = BCD2BIN(h->min);
 62		t->tm_hour = BCD2BIN(h->hour);
 63		t->tm_wday = BCD2BIN(h->wday);
 64		t->tm_mday = BCD2BIN(h->mday);
 65		t->tm_mon = BCD2BIN(h->month);
 66		t->tm_year = BCD2BIN(h->year);
 67		h->csr &= ~C_READ;
 68	}
 69
 70	local_irq_restore(flags);
 71
 72	return 0;
 73}
 74/* Not much we can do here */
 75unsigned long sun3x_gettimeoffset (void)
 76{
 77    return 0L;
 78}
 79
 80#if 0
 81static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
 82{
 83    void (*vector)(int, void *, struct pt_regs *) = dev_id;
 84
 85    /* Clear the pending interrupt - pulse the enable line low */
 86    disable_irq(5);
 87    enable_irq(5);
 88
 89    vector(irq, NULL, regs);
 90}
 91#endif
 92
 93void __init sun3x_sched_init(irqreturn_t (*vector)(int, void *, struct pt_regs *))
 94{
 95
 96	sun3_disable_interrupts();
 97
 98
 99    /* Pulse enable low to get the clock started */
100	sun3_disable_irq(5);
101	sun3_enable_irq(5);
102	sun3_enable_interrupts();
103}